Allergan Aesthetics, an AbbVie Company, Irvine, California, USA.
SGS Stephens Inc, Richardson, Texas, USA.
J Cosmet Dermatol. 2022 Nov;21(11):5739-5746. doi: 10.1111/jocd.15165. Epub 2022 Sep 5.
Melasma is an acquired disorder that results in irregular brown patches on the skin that can occur due to hormonal changes. Although pregnancy-induced melasma is usually temporary, it can become a chronic condition, with significant negative impact on quality of life (QoL).
Determine the efficacy and tolerability of a topical, non-hydroquinone, non-retinol pigment-correcting serum (LYT2) for the treatment of pregnancy-induced melasma.
This 12-week, single-center clinical trial enrolled 34 non-pregnant women who developed mild to severe facial melasma following a previous pregnancy (mean age, 42 years). LYT2 was applied twice daily to facial skin for 12 weeks in addition to a basic skincare regimen. Outcomes included changes from baseline in skin physiology parameters, such as brightness (L*), using objective digital image analysis, investigator-rated Overall Hyperpigmentation scale, Global Improvement, and Melasma Area and Severity Index (MASI), as well as subject-assessed Melasma Quality of Life Scale. Subjects also completed a questionnaire on self-perceived efficacy and attributes of the study product. Tolerability was assessed by the investigators (erythema, scaling, and edema) and subjects (burning/stinging and itching). Clinical assessments were conducted at baseline and Weeks 4, 8, and 12.
LYT2 provided statistically significant reductions in overall hyperpigmentation scores as early as Week 4 (-5.8% change from baseline) and continued through Week 12 (-14.6% change from baseline; all p < 0.001). Significant improvements in MASI scores and QoL were also achieved following LYT2 treatment, which was well tolerated.
LYT2 represents a new efficacious alternative to hydroquinone-based treatments for pregnancy-induced melasma.
黄褐斑是一种获得性疾病,导致皮肤出现不规则的棕色斑块,可能由于激素变化引起。虽然妊娠引起的黄褐斑通常是暂时的,但它可能成为一种慢性疾病,对生活质量(QoL)有重大负面影响。
确定一种局部、非氢醌、非视黄醇色素纠正血清(LYT2)治疗妊娠引起的黄褐斑的疗效和耐受性。
这是一项为期 12 周的单中心临床试验,招募了 34 名非孕妇,她们在之前的妊娠后出现了轻度至重度面部黄褐斑(平均年龄 42 岁)。LYT2 在基础皮肤护理方案的基础上,每天两次涂抹于面部皮肤,共 12 周。结局包括使用客观数字图像分析评估皮肤生理参数(如亮度 L*)、研究者评估的总体色素沉着量表、总体改善、黄褐斑面积和严重程度指数(MASI)以及患者评估的黄褐斑生活质量量表的基线变化。受试者还完成了一份关于自我感知疗效和研究产品属性的问卷。耐受性由研究者(红斑、脱屑和水肿)和受试者(烧灼感/刺痛和瘙痒)评估。临床评估在基线和第 4、8 和 12 周进行。
LYT2 早在第 4 周(与基线相比变化-5.8%)就提供了统计学上显著的总体色素沉着评分降低,并持续到第 12 周(与基线相比变化-14.6%;所有 p<0.001)。LYT2 治疗后,MASI 评分和 QoL 也显著改善,且耐受性良好。
LYT2 代表了一种治疗妊娠引起的黄褐斑的新的有效替代氢醌治疗方法。